65258_aarsrapport-2012

Annual Report 2012

2 Annual Report 2012

Contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

The Department . . . . . . . . . . . . . . . . . . . . . . . 4 - 5

Selected Projects . . . . . . . . . . . . . . . . . . . . . . 6 - 11

New PhDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 - 17

Finished PhDs . . . . . . . . . . . . . . . . . . . . . . . . . 18 - 19

Selected Journal Papers . . . . . . . . . . . . . . . . 20 - 23

Selected Events . . . . . . . . . . . . . . . . . . . . . . . 24 - 25

Selected New Laboratory Facilities . . . . . 26 - 29

Awards and Honours . . . . . . . . . . . . . . . . . . 30

Key Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Guests at the Department . . . . . . . . . . . . . 32-34

Graduated in 2012 . . . . . . . . . . . . . . . . . . . . . 35

Contact Information . . . . . . . . . . . . . . . . . . . 36

POSTER PARTY 2012

THE ENERGY SPONSOR

PROGRAMME

Graduation 2012:1st prize

for excellent and innovative

project work

3Annual Report 2012

Introduction

2012 was a successful year for the Department of Energy Technology . We achieved a broad range of great research results and started many new and exciting research projects in collaboration with companies . Furthermore, we completed a record high number of PhDs, welcomed many new students and graduated a range of new candidates for the industry . This year we also started a large renovation of our laboratory facilities in both Aalborg and Esbjerg . The renovation extends to 2015 and will give us brand new, up-to-date, world-class facilities for research as well as teaching .

In terms of education we are very pleased with the fact that we have had an increase in stu-dent intake in 2012; in Aalborg with 67 students and in Esbjerg with 26 students on first year . Likewise, a large number of candidates have finished in all of our specialisations, including several foreign students . In Esbjerg, the department has moreover increased its engagement by undertaking a part of the teaching and the responsibility for the electronics area, and we expect good synergy between energy and electronics .

In terms of research we have once again achieved good results and increased all of our key figures . This includes among others 22 finished PhDs, 35 new PhD projects and an external turnover of 56 million DKK . Moreover, we have in 2012 achieved a record of 319 research publications and increased our focus on the best publication channels . In collaboration with industry we have initiated a range of large projects, which all have started out well to the satisfaction of all parties . In 2012, the department furthermore received its first ERC Advanced Grant from the European Research Council .

In this annual report you can read more about the results from the Department of Energy Technology in 2012 . We have selected some of our best and most important results and activi-ties within a selection of the areas we work in . However, not all our work is presented in this report and therefore, we refer you to our homepage for further information: www .et .aau .dk

We are very pleased with our results in 2012 and are ready to pursue new goals in 2013 - in collaboration with current and new partners .

John K . PedersenHead of Energy Department


The Department of Energy Technology focuses on a sustainable future, thus re-search is carried out in renewable energy, efficient energy consumption and distri-bution, conversion technologies and control of energy . The department addresses the energy technological challenges, which are met on the path to a society free from fossils, based on a robust energy system with a high degree of supply security .

This is connected to a number of challenges within e .g . optimal consumption of biomass, integration of wind, photovoltaic and wave energy in the energy system and configuration of a future intelligent grid . Furthermore, research is carried out with regards to challenges with transportation by electric cars, efficient and reliable conversion technologies and future houses, which produce net energy .

Sections and research programmesTo meet these challenges, the Department of Energy Technology is organised in six sections and eleven research programmes . The six sections make up the basic organisation of all scientific employees and reflect the primary core competences .

The eleven research programmes reflect the current research focus in technolo-gies and applications . The programmes are dynamic and continuously adjusted to new possibilities . Each research programme contains a series of research, PhD and collaboration projects and has a programme leader, who is in charge of the pro-gramme and its development .

The Department

5Annual Report 2012

Aims for the Department of Energy TechnologyThe department has three overall aims:- to conduct definitive international leading edge research with strong industry

interaction .- to educate highly qualified candidates at all levels from BSc to MSc and PhD .- to interact with peers in the industry and academia .

Close collaborationsThe Department of Energy Technology places great emphasis on being an interna-tional and collaboration oriented university with world class experimental facilities .The department has a comprehensive collaboration with the industry in both research projects and consulting and is proud of the fact that numerous world-renowned companies have chosen to have in-house divisions at the department, which contributes to ever closer collaborations .

The Department


Intelligent and Efficient Power Electronics (IEPE)The driving ambition is to develop solutions for the future intelligent and energy- efficient products that meet the needs of new knowledge and technological edge .The project focuses on power electronics that is used to control the electrical power so minimal power is lost as heat . This is a key technology for energy production from renewable sources such as wind turbines and solar cells, but can also be used to achieve major energy savings in all other electrical appliances and installations .

Period: April 1 2012 – March 31 2017 .

Participants: KK-Electronic, Vestas, Danfoss, Grundfos, Aalborg University, Technical University of Denmark, University of Southern Denmark, Center for Electrical Energy Systems (CEES) . Funding: Danish National Advanced Technology Foundation . Total project amount: 108 .259 .837 DKK (Dept . of ET part 29 .399 .328 DKK) .

Contact Person: Stig Munk-Nielsen - smn@et .aau .dk

4DH – 4th generation of District Heating4DH is an international research centre, which assists in the development of 4th Gen-eration District Heating Technologies and Systems . 4DH generates knowledge of the design of future district heating network technologies including the development of components and concepts; planning and management tools based on Geographical Information System (GIS); and tools for decision-making support of the involvement of production units in electricity markets .

The IEPE Kick Off Meeting

Selected Projects

7Annual Report 2012

Period: January 1 2012 – December 31 2017 .

Participants: Aalborg Forsyning, AffaldVarme Aarhus, Chalmers Technical University, COWI, CTR, Danfoss, Desmi, District Energy Development Center, Efsen Engineering, EMD, , Halmstad University, Kamstrup, Københavns Energi, Linnaeus University, Logstor, NIRAS, Rambøll, Ribe Jernindustri, Ringkøbing-Skjern Kommune, PlanEnergi, SPX, Tsing-hua University, DTU, SDU, University of Zagreb, VEKS, Vestforbrændingen, Wallenius AB .

Funding: The Danish Council for Strategic Research . Total project amount: 37 .000 .000 DKK (Dept . of ET part: 5 .152 .391 DKK) .

Contact Person: Associate Professor Carsten Bojesen - cbo@et .aau .dk

PRO-NETProtection of Power Electronically Interfaced LV Distributed Generation Networks (PRO-NET) aims to develop the communication technology based on intelligent protection and post fault control methods for distribution systems . The developed protection and control methods would minimise the possibility of losing power supply in an abnormal situation and restore normal operation as quickly as possible .

Period: November 1 2011 – November 1 2014 .

Participants: Simula Research Laboratory, The Scientific and Technological Research Council of Turkey .

Funding: Energinet .dk . Total project amount: 7 .312 .500 DKK (Dept . of ET part: 2 .449 .000 DKK) .

Contact Person: Zhe Chen - zch@et .aau .dk

TotalFlexThe aim of TotalFlex is to establish a flexible electricity grid that includes the entire food chain from production to end user - and which can give everyone involved financial and environmental benefits . The vision is to develop a cost-effective, market-based system that utilises total flexibility in energy demand and production, taking balance and grid constraints into account . The aim of TotalFlex is therefore to activate all pieces

Selected Projects


Selected Projects

of demand response from households . This will be done by intelligent detection using existing data from meters .

Period: January 1 2012 – June 30 2015 .

Participants: Neogrid Technologies, Aalborg University, Copenhagen Business School, Nyfors, Nordjysk Elhandel, Conscius and Zense Technology .

Funding: ForskEL programme, Energinet .dk . Total project amount: 35 .366 .000 DKK (Dept . of ET part: 3 . 585 .000 DKK) .

Contact Person: Birgitte Bak-Jensen - bbj@et .aau .dk

EDGE (Efficient Distribution of Green Energy)The goal of the EDGE project is to try to sustain the expected high integration of wind energy in the Danish power grid through an effective coordination and control of elec-tricity generation and consumption . Specifically, the project aims at developing new control methods for managing the flow of energy between consumers and producers seen both at distribution and transmission level, and it will take the dynamics of the power market, the dynamics of its actors, the constraints of the distribution network, and the limitations of communication solutions into account .

Period: April 1 2012 – March 31 2016 .

Participants: Aalborg University, Aarhus University, Forschungszentrum Telekommunika-tion Wien, University of Groningen, Norweigian University of Science and Technology, DONG Energy, Danfoss, kk-electronic .

Funding: The Danish Council for Strategic Research . Total project amount: 17 .068 .286 DKK (Dept . of ET part: 3 .396 .473 DKK) .

Contact Person: Birgitte Bak-Jensen - bbj@et .aau .dk

mailto:[email protected]

9Annual Report 2012

Large Scale Bio Energy Lab The purposes of the project are to develop technical, economical and sustainable solutions to the existing infrastructure of a large number of biogas plants in Schleswig-Holstein and the region of Southern Denmark . New solutions can count identifying and integrate new feedstock’s, so the predominating energy cropping systems of Maize silage can be decreased, and to find new feedstock’s on the Danish site of the cross border to bring valuable solutions besides manure and diminishing food wastes to the biogas plant sectors .


Participants: AAU lead partner (ET), AAU Esbjerg campus and University of Applied Sci-ence, Flensburg and University of Flensburg, Germany .

Funding: Total project amount: 7 .941 .650 DKK (Dept . of ET part: 3 .028 .065 DKK) .

Contact Person: Associate Professor Jens Bo Holm-Nielsen, ET – Esbjerg Campus - jhn@et .aau .dk

Selected Projects


EUDP HydrofactionEUDP Hydrofaction is a pilot project intended to establish a platform for hydrother-mal liquefaction as a sustainable, 2nd generation technology to produce biofuels . Hydrothermal liquefaction, or HTL, is a thermochemical technology in which high pressure water is used as an agent to decompose biomass and produce a high quality bio-crude, similar in many respects to fossil crude oil . A main purpose of the project is to design and construct a 5 kg/h continuous test facility, the CBS1, which will be installed at ET in 2Q 2013 . Significant additional funding for the CBS1 has been pro-vided by the Obel Foundation and the Faculty of Technology and Science, AAU . The CBS1 will be the most advanced HTL experimental facility in the world, and will be a main component in future research on sustainable biofuels at ET .


Participants: Steeper Energy ApS (Steen Iversen, CTO) (project lead), ET-AAU, Dept . of Chemistry, AU .

Funding: EUDP . Total project amount: 6 .329 .460 DKK (Dept . of ET part: 1 .200 .960 DKK) .

Contact Person: Professor Lasse Rosendahl - lar@et .aau .dk

Selected Projects

11Annual Report 2012

MegaDriveThe H2Drive® fuel cell power pack module is used in industrial vehicles below 3 tons . MegaDrive will focus on developing a prototype system based on the present tech-nology, with the aim of increasing power delivery to enable use in 3-7 tons material handling vehicles . Department of Energy Technology contribute to the project with theoretical modelling and design of future concepts for power systems from 100 kW and larger .

Period: September 1 2012 – December 31 2014 .

Participants: H2Logic A/S, EnergiMidt Infrastruktur A/S, DTU – Electro, Aalborg University (ET) .

Funding: EUDP Total project amount: 17 .461 .573 DKK (Dept . of ET part: 2 .516 .625 DKK) .

Contact Person: Associate Professor Mads Pagh Nielsen - mpn@et .aau .dk

Variable-speed, robust synchronous reluctance machine drive systemsSynchronous Reluctance Machine (SyncRM) is receiving increasing attentions since the permanent magnet material crisis . This project develops a robust, compact drive system using SyncRM . Small DC-link capacitor is used to bring a compact design of the frequency converter, which is highly appreciated by the industry . The research work aims at introducing simple, robust, sensorless control algorithms that can maximize the performance of the SyncRM drive at various working conditions .

Period: September 15th 2012 – September 14th 2015 .

Participants: Aalborg University, Lodam A/S, Dansk Energi, PSO-ELforsk programme .

Funding: EUDP Total project amount: 2 .875 .590 DKK (Dept . of ET part: 2 .875 .590 DKK) .

Contact Person: Associate Professor Kaiyuan Lu - klu@et .aau .dk

Selected Projects


Amir Sajjad BahmanTitle: Multidisciplinary Design Tool for Power CircuitsPower electronic components and circuits are essential parts of energy generation systems such as wind turbines, photovoltaic systems, pumps, adjustable speed drives etc . In order to design for reliability it is important to be able to simulate electrical behaviour, thermal and mechanical behaviour and this project will explore the possibilities to develop a design tool which is able to simulate those matters . The tool can be one tool or it can be co-simulation using different tools .

Ane Katharina Paarup MeyerTitle: Large Scale Bioenergy Lab–Identification, Analysis, Mapping and Management of Sustainable Biomass Resources in the Region of Southern Denmark-Sleswig-K.E.R.N., GermanyThe Ph .D . project is part of the Interreg 4A project: “Large Scale Bioenergy Laboratory” and its objective is to identify, make spatial analysis and set up management strategies for sustainable biomass resources for bioenergy production that does not cause negative impacts on nature, environment, climate and food production in the project area (Region of Southern Denmark-Schleswig-K .E .R .N ., Germany) .

Bishnu Prasad BhattaraiTitle: Control, Protection and Demand Response in the Low Voltage GridsFuture power distribution system needs to incorporate intelligent control and protection coordination so as to make the system autonomous and facilitate smart grid objectives such as demand response . This pro-ject aims to develop and validate control and protection system architectures to coordinate the elements of smart grids, mainly the smart meters and controllable loads, while taking into account the information and communication technology (ICT) characteristics .

Chao WangTitle: Intelligent Fault Diagnosis of Large-Scale Wind TurbinesThe objective of this project is to increase the reliability as well as the availability of wind turbines by apply-ing intelligent fault diagnosis technology . This project will focus on the development of effective feature extraction methods and intelligent fault diagnosis models which are suitable for analysis of faults in wind turbine based on fully understanding the fault mechanism in wind power system .

Chendan LiTitle: Quality of Energy Services for MV Clusters of Microgrids – The Quaternary Control Level of MicroGridsIn this project, a standardised modelling and analysis methods will be strived to define based on the state-of-art of power electronics technology . The dynamic stability analysis and reconfiguration for protection coordination and route optimisation will be studied in order to improve the Quality of Energy Services both for end users and the utilities .

Dan WuTitle: Coordinated Control for Power Quality in Grid Connected and Islanded Three-Phase MicroGridsMicrogrid can be considered as a controllable local grid with multiple renewable energy sources, energy storage systems, and loads . However, a practical islanded system may suffer from the limitation of power generation or storage capability . This project is oriented the coordinated control of RES, ESS and loads, to achieve a flexible and reliable operation of Microgrids .

New PhDs


Dao ZhouTitle: Reliability and Control Strategies for Wind Turbine SystemOver the last years, the global wind energy capacity has increased rapidly and became the fastest develop-ing renewable energy technology . One of the project’s targets is to study and compare two dominating wind power configurations – partial-scale and full-scale power converters with two-level back-to-back voltage source converters, regarding on efficiency, reliability, redundancy and cost . Then control strategies related to improving power loss distribution, thermal performance and lifetime model will be proposed based on evaluation and investigation . Eventually, the analysis results are expected to be verified by simu-lation and experiment .

Dong WangTitle: Variable-speed, Robust Synchronous Reluctance Machine Drive SystemsThis project will develop a robust, compact drive system using synchronous reluctance machine as the drive motor . Small DC-link capacitor is used to bring a compact design of the frequency converter, which is desired by the industry . The research work aims at developing simple, robust control algorithms that can maximize the performance of the drive under various working conditions .

Elsayed Mohamed AbulanwarTitle: Wind Farm Integration into the Power SystemThis project is dedicated to investigate the transient stability issues of wind power plant, WPP grid-connected systems that are subjected to islanding scenarios under three operation modes, namely, grid-connected, islanded and synchronization modes . WPP Grid codes will be considered to achieve LVRT, capability to ensure safe operation of the WTs . The study target is to present a generalised control strategy for different operation modes to provide better transient performance and smooth transition between these modes .

Emmanouil DimopoulosTitle: High Efficient Power Electronics Converter for New Generator TechnologyScientists from Danfoss PolyPower A/S have developed a new smart material titled Dielectric ElectroAc-tive Polymer - DEAP, which can convert mechanical energy into electrical one . One of the most prominent future utilisations of the DEAP generator is the wave energy application . This Ph .D . focuses on the design and realisation of a suitable power electronics converter, which will render the energy harvesting process via a DEAP generator feasible .

Fan ZhouTitle: Degradation Mechanisms and Durability Test Methods of High Temperature PEM Fuel Cell with PBI MembraneThe purpose of this PhD project is to provide and understand the degradation mechanisms of a PBI mem-branes based HT-PEM fuel cell . Shorter lifetime of HT-PEM fuel cells is expected compared with the LT-PEM fuel cells since the technology is less mature and degradation can be accelerated at higher operation tem-perature . Hence improving the durability is one of the most significant challenges for commercialisation of HT-PEM fuel cells .

New PhDs


Ge XieTitle: Design of Parameter Independent, High Performance Sensorless Controllers for Permanent Magnet Synchronous MachinesPermanent Magnet (PM) machine has become the most promising drive motor candidate for many indus-trial applications, due to its high efficiency and high torque density . Sensorless control is often required to control a PM machine, to save the cost and increase the reliability of the drive system . The focus of this Ph . D . project will be to improve the existing parameter independent sensorless control algorithms, with re-spect to performance improvement and simplification of the algorithm to ease implementation in practice .

Ghulam Mustafa ShoroTitle: Integration of Photovoltaic Systems with the Smart GridThe aim of the project is to design a Smart Inverter that should manage Power Quality, Islanding, LVRT, and support the power grid‐related control functions . Smart grid can help with the intermittency problem; digital monitoring, switching, and relays could get the resources in phase so it can interconnect without disruption . Smart Inverter serves as an interface between source and load that will provide better power, greater protection .

Helong LiTitle: Power Electronic Converter used in Wind Power System based on SiC and GaN Type ComponentsSiC devices rated 1200 V or 1700 V are expected to replace IGBT devices . Below 600 V a candidate is GaN technology and they switch a decade faster than Si MosFet . We will design SiC and GaN converters and ob-tain their performance of power efficiency, power density and reliability . We will measure how many cycles to failure the SiC and GaN devices . We will analyse reasons of failure by applying contacts to department of physics .

Huang MinTitle: Control and Reliability of Power Electronics Converters for MicrogridsThe objective of this project is to study efficient and reliable power electronics converter systems for micro-grids, which allow the operation in islanding mode with voltage control and load demand sharing meaning a risk of frequency and voltage variation . At the same time the operation in grid-connected mode with current control is studied to improve power quality and ensure complete grid synchronisation .

Jakob Bærholm GlasdamTitle: Harmonics in Large Offshore Wind Farms Employing Power Electronics in the Transmission SystemThis Industrial PhD aims at gaining a deeper understanding on the harmonic emission of Static Compensa-tors and High-Voltage Direct Current converters, which will be widely used for grid connection of offshore wind farms . The project investigates how these converters, from a harmonic perspective, interact with each other, with the wind turbine converters etc . The objective is to develop models and a best practice for harmonic stability assessment .

Jie Tian Title: Advanced Coordinative Control of Wind Power Conversion SystemThe PhD project will investigate control methods and design control algorithms for a wind power conver-sion system . The main research contents are: coordinative control of wind turbines, including pitch control, power electronic converter control and wind farm control to realize optimal wind power production and contribute to the reduction of turbine stress, load and power losses, and to assist the grid integration and farm operation of large wind turbines .

New PhDs


New PhDs

Konstantinos KouzelisTitle: Development of a Grid Load Model and Technical VPP (TVPP)Power flow is performed using power flow programs which can analyse, if there are any grid limit viola-tions . However, such power flow analysis is very time consuming and cannot be used for online calcula-tions . Therefore, it is essential to generate simplified models of the distribution network . These “adap-tive” models will be used to set up a criterion for how much power it is possible to trade in the different timeslots at the market place .

Kristian Kjær JustesenTitle: Modeling and Control of a Reformed Methanol Fuel Cell System to be used in Electric Hybrid SystemsStoring hydrogen for fuel cells is impractical and energy consuming . Operating HTPEM fuel cells on hydro-gen from a methanol reformer is therefore an interesting prospect . Integrated systems where this concept is used are called Reformed Methanol Fuel Cell systems . They are complex systems with many internally coupled energy flows . This PhD project is concerned with modeling and controlling these systems in a safe, efficient and fast manner .

Lars JürgensenTitle: Large Scale Bioenergy Lab: Methanation as an Option for Dynamic Small Scale Biogas Upgrading in the Region of Southern Denmark—Schleswig—K.E.R.N. GermanyEnergy systems with a high content of fluctuating renewables need a management of energy production and demand and storage systems . In this project a novel dynamic biogas upgrading process is developed to use the existing biogas plant pool in Schleswig-Holstein for such a management and storage . There will be two process stages: (i) CHP production during energy demand and (ii) natural gas production from surplus production .

Lexuan MengTitle: Tertiary Control and Energy Management System in MicrogridsThe PhD project, named Tertiary Level Energy Management in Microgrids, started from October 2012 . Tertiary level management deals with optimal operation and power flow control . Untill now, general hierarchy of the management system is proposed, and applied to a DC MG optimisation issue to improve system efficiency . Future work will be the development of Energy Management System and AC Microgrid optimisation .

Mehmet Sertug BasarTitle: State Monitoring and Online Control Optimization of Electrical Drive SystemsTo optimise the performance of a system involving variable speed drives it is important to have detailed knowledge of the characteristics and conditions of the primary components in the system, e .g . the motor, the load and the link between them . It is the objective of this project to study observability of various drive systems (from the drive’s perspective), develop rational methods for online acquisition of system data and to demonstrate the use of these data in an optimised control system .

S. Mostafa F. AstanehTitle: Optimisation of Electricity Markets with Wind Power and DG Units for good Economics and Grid SecurityHigh intermittency in the nature of wind power emphasises conceptual revising in the regulations and mechanisms of electricity markets which enjoy high penetration levels . This PhD project will study elec-tricity market mechanisms, pricing, regulation power and load characteristics . The effecting factors on economic performance of the mixed pattern power system will be studied . Expected results of the project will enhance the efficiency and performance of wind dominant electricity markets .


New PhDs

Nicolae-Cristian SintamareanTitle: Emerging Power Electronics Devices and Circuit DesignThe goal of the project is to develop a Reliability Design Tool for the new generation of Power Converters which are based on WBG-semiconductor devices, used in photovoltaic systems, pump, adjustable speed drives etc . The design platform will include electrical, thermal and life time models . These WBG semiconductor based devices have superior electrical properties and are likely candidates to replace Si in some applications . Their recent commercialisation is expected to revolutionise the power electronics industry in the near future .

Pramod GhimireTitle: Real Time Measurement and Lifetime Prediction Methods of Power ModulesThe objective of this research is to develop a new measurement technique which measures the physical quantities such as voltage, temperature and current in real time and detects wear out state of the power transistors . A test bench will be prepared capable of stressing transistors in real life working point by controlling the voltage, current and phase of the device under test . The new measurement technique will be tested in the test rig and the technique will include in standard IGBT gate driver module for the field operation .

Qobad ShafieeTitle: Intelligent Energy Microgrids ClustersHierarchical control for MicroGrids has been proposed recently in order to standardise their operation and functions . This PhD project is focused on the secondary control design of islanded and grid connected MicroGrids in order to regulate frequency, voltage, active power and reactive power . Both centralised and distributed secondary control strategies as well as their corresponding communication issues will be studied in this project .

Reza Ahmadi KordkheiliTitle: Flexibility and Balancing in Distribution NetworksThe objectives of this project are to deal with: a) modelling of the distribution network; b) load balancing in the network: the objective is to propose new control algorithms to optimise the use of demand-side response provided via flexibility management . The hypothesis of this project are: a) It is possible to make a fast, predictive model for load; b) the grid can be simulated with the proposed load models to evaluate possible capabilities; c) a control scheme for demand side management .

Rongwu ZhuTitle: Advanced Control Strategy for Wind Turbine System under Abnormal ConditionThe main objective of this project is to improve the stability of wind turbine system and to fulfill the requirements of the grid code under abnormal condition, especially under serious grid fault . Much more attention will be paid to the control strategies and new topologies in order to optimise power quality (eliminating harmonics) and to achieve fault ride through .

Rui WuTitle: Multi-Physics Based Modelling of Power Electronic Components and CircuitsThe reliability of power electronic components and circuits are becoming more and more important in energy conversion systems, e .g . wind turbines, photovoltaic systems, electrical vehicles, motor drives etc . This project will adopt a multi-physics approach to model the basic components and circuits in power elec-tronic applications . The expected results are contributing to state-of-the-art multi-physics models of power electronic components and achieving better understanding of power devices failure mechanisms . Further-more, the proposal multi-physics models will be implanted into multi-disciplinary converter design tools to simulate weak spots, prevent potential failures, as well as calculate life-time of power electronic systems .


New PhDs

Simon Lennart SahlinTitle: Modelling and Characterisation of a 5kW Methanol Reformer Fuel Cell SystemThe purpose of this project is to develop control strategies that can enhance the efficiency, durability and the response time for a 5kW methanol fuelled fuel cell system . The heat is transferred through an oil circuit to utilise the heat from burning the excess hydrogen from the fuel cell . The key element in this project is to characterise the different components in the system to better understand the limitations of this technology .

Soma MohammadiTitle: Conversion of Existing District Heating Grids to Low-Temperature Operation and Extension to New Areas of BuildingsThe Hypothesis of this project is that it is possible to convert/extend the existing district heating grids from high temperature to low temperature, i .e . supply/return temperatures of 50=20oC to the areas with low energy demand buildings . Therefore it becomes possible to utilise renewable energy in form of heat to new or renovated buildings in urban areas . The project focus is on the extension of district heating grids to areas where the existing buildings will be energy renovated over the next decades or new built-areas with low energy demand buildings .

Thomas Helmer PedersenTitle: Optimising Fuel Flexibility through High Quality Bio-OilsThis PhD project investigates the hydrothermal liquefaction process; a potential route for deriving liquid drop-in biofuels from lignocellulosic biomass . The major objective is to address the degradation and inter-action of biomass constituents in the conversion from raw biomass to finished product . It is envisioned that a topology can be established, for the prediction of product yield and quality based on biomass composi-tion and process conditions .

Tushar BatraTitle: Magnetic Coupling for Wireless Charging of Electric VehiclesThis PhD project is a part of the Wireless Inductive Charging to Interoperation Testing (WIC2IT) project which consist of several European companies and universities . The overall purpose of the WIC2IT project is to develop a standard for wireless inductive charging of electric vehicles in order to disseminate this tech-nology . The secondary purpose of this project would be the identification of the unwanted components in the circuit with the optimise use of power electronics in the circuit .

Yanjun TianTitle: Research of Active Distribution Network with High Penetration of Renewable EnergiesThe research of active distribution network aims to develop a scheme to coordinate the DGs to improve the integration and efficiency of renewable energy in the power system . The objective of this project is to solve the power quality problems at a systematic level, and optimise the active distribution network power flow, and also improve its capability with the utility grid . And the traditional solutions to the harmonics and imbalance are based on the single DG control, which may deteriorate the system stability for their uncoor-dinated behaviour, so a system-level solution might be a better choice .

Zian QinTitle: Control Strategies of WTG with Energy Storage Systems for Improved ReliabilityThis topic is about control strategies of wind power converter with energy storage system for improved reliability . The main idea is to utilise short-term energy storage technologies to reduce the power fluctua-tion in wind power system to decrease the temperature variations of the power module and finally prolong the cycle life of the power module .


Weihao Hu: Operation of Modern Distribution Power Systems in Competitive Electricity Markets .

Chi Su:Oscillation Performance and Wide-area Coordination Control of Power System with Large-scale Wind Farms .

Samuel Simon Araya:High Temperature PEM Fuel Cells - Degradation and Durability .

Teruo Ohno:Dynamic Study on the 400 kV 60 km Kyndbyværket - Asnæsværket Lineems .

Alireza Rezania Kolaei:Design, Modelling and Optimisation of Thermoelectrical Power Generation Devices .

Rodrigo da Silva Optimization of Multiteminal VSC-HVDC Transmission for Wind Power Plants .

Andrzej Adamczyk:Power Systems Oscillation Damping with Augmented Wind Power Plant .

Ömer Göksu:Control of Wind Turbines during Symmetrical and Asymetrical Grid Faults .

Müfit Altin:Dynamic Frequency Response of Wind Power Plants .

Maciej Swierczynski:Li-ion Battery Energy Storage for Augmented Wind Power Plants .

Finished PhDs


Finished PhDs

Mu Wei:Communications for Coordinative Control of Wind Power Systems .

Fujin Deng:Wind Turbine Configuration for Offshore Wind Farm with DC Connection .

Yang Yang:Large Eddy Simulation of Flow Structures in the Sydney Swirl Burner .

Erhan Demirok:Control of Grid Interactive PV Inverters for High Penetration in Low Voltage Distribu-tion Networks .

Ram Krishan Maheshwari:The Use of Active Elements to Reduce the Size and Weight of Passive Components in Adjustable Speed Drives .

Lajos Török:Grid Converter for LED Based Intelligent Light Source .

Szymon Beczkowski:Control and Driving Methods for LED Based Intelligent Light Sources .

Ionut Trintis:Medium Voltage Grid Converters for Storage .

Vincenzo Liso:Design and Control of a SOFC Micro CHP System .

Lukasz Kocewiak:Harmonics in Large Offshore Wind Farms .

Torben Matzen:Sensorless Control of Permanent Magnet Synchronous Machines .

Alexandros Arsalis: Development of Next Generation Micro-CHP System .


Stator Current Harmonic Control with Resonant Controller for Doubly Fed Induction GeneratorChangjin Liu; Frede Blaabjerg; Wenjie Chen; Dehong Xu I E E E Transactions on Power Electronics, Vol . 27, No . 7, pp . 3207-3220 .

Synthesis of Variable Harmonic Impedance in Inverter-Interfaced Distributed Generation Unit for Harmonic Damping Throughout a Distribution NetworkXiongfei Wang; Frede Blaabjerg; Zhe ChenI E E E Transactions on Industry Applications, Vol . 48, No . 4, pp . 1407-1417 .

Derivation of Theoretical Formulas of the Frequency Component Contained in the Overvoltage Related to Long EHV CablesTeruo Ohno; Claus Leth Bak; Ametani Akihiro; Wojciech Wiechowski; Thomas Kjærsgaard SørensenI E E E Transactions on Power Delivery, Vol . 27, No . 2, pp . 866-876 .

Advanced Control Architectures for Intelligent Microgrids—Part II: Power Quality, Energy Storage, and AC/DC MicrogridsJosep M . Guerrero; Poh Chiang Loh; Tzung-Lin Lee; Mukul ChandorkarI E E E Transactions on Industrial Electronics, Vol . 60, No . 4, pp . 1263-1270 .

Power Electronics Converters for Wind Turbine SystemsFrede Blaabjerg; Marco Liserre; Ke MaI E E E Transactions on Industry Applications, Vol . 48, No, 2, pp . 708-719 .

Experimental Characterisation of the Poisoning Effects of Methanol-Based Reformate Impurities on a PBI-Based High Temperature PEM Fuel CellSamuel Simon Araya; Søren Juhl Andreasen; Søren Knudsen KærEnergies, Vol . 5, No . 11, p . 4251-4267 .

Selected Journal Papers


Characterising and Modelling of an 88 MW Grate-Fired Boiler Burning Wheat Straw: Experience and lessonsChungen Yin; Lasse Rosendahl; Sønnik Clausen; Søren HvidEnergy, Vol . 41, No . 1, pp . 473-482 .

Design of Neutral-Point Voltage Controller of a Three-level NPC Inverter with Small DC-Link CapacitorsRamKrishan Maheshwari; Stig Munk-Nielsen; Sergio Busquets-MongeI E E E Transactions on Industrial Electronics, Vol . 60, No . 5, pp . 1861-1871 .

The Impact of Power Switching Devices on the Thermal Performance of a 10 MW Wind Power NPC ConverterKe Ma; Frede Blaabjerg, F . Energies, Vol . 5, No . 7, pp . 2559-2577 .

Estimation of the Required Modelling Depth for the Simulation of Cable Switching in a Cable-based NetworkFilipe Faria Da Silva; Claus Leth Bak; Per Balle Holst I E E E Transactions on Power Delivery, Vol . 27, No . 4, pp . 1902-1908 .

Modelling, Analysis, and Design of Stationary Reference Frame Droop Controlled Parallel Three-Phase Voltage Source InvertersJuan CarlosVasquez; Josep M . Guerrero ; Mehdi Savaghebi; Joaquín Eloy-Garcia; Remus TeodorescuI E E E Transactions on Industrial Electronics, Vol . 60, No . 4, pp . 1271 – 1280 .

Negative Sequence Current Control in Wind Power Plants With VSC-HVDC ConnectionSanjay Chaudhary; Remus Teodorescu; Pedro Rodriguez; Philip Carne Kjaer; Ani M . GoleI E E E Transactions on Sustainable Energy, Vol . 3, No . 3, pp . 535-544 .

Power Capability Investigation Based on Electrothermal Models of Press-pack IGBT Three-Level NPC and ANPC VSCs for Multimegawatt Wind TurbinesOsman Senturk; Lars Helle; Stig Munk-Nielsen; Pedro Rodriguez; Remus TeodorescuI E E E Transactions on Power Electronics, Vol . 27, No . 7, pp . 3195-3206 .

An Active Damping Technique for Small DC-Link Capacitor Based Drive SystemRamKrishan Maheshwari; Stig Munk-Nielsen; Kaiyuan LuI E E E Transactions on Industrial Informatics, Vol . 9, No . 2, pp . 848-858 .



Experimental Investigation of Thermoelectric Power Generation versus Coolant Pumping Power in a Microchannel Heat SinkAlireza Rezania Kolaei; Lasse Rosendahl; Søren Juhl AndreasenInternational Communications in Heat and Mass Transfer, Vol . 39, No . 8 pp . 1054-1058 .

Numerical Model of a Thermoelectric Generator with Compact Plate-Fin Heat Exchanger for High Temperature PEM Fuel Cell Exhaust Heat RecoveryXin Gao; Søren Juhl Andreasen; Min Chen; Søren Knudsen Kær International Journal of Hydrogen Energy, Vol . 37, No . 10, pp . 8490-8498 .

Common-Mode Voltage Reduction in a Motor Drive System with a Power Factor CorrectionJ . Adabi; A . A . Boora; F . Zare; A . Nami; A . Ghosh; Frede BlaabjergIET Power Electronics, Vol . 5, No . 3, pp . 366-375 .

Thermal Effect of Ceramic Substrate on Heat Distribution in Thermoelectric GeneratorsAlireza Rezania Kolaei; Lasse RosendahlJournal of Electronic Materials, Vol . 41, No . 6, pp . 1343-1347 .

Estimation of the Required Modelling Depth for the Simulation of Cable Switching in a Cable-Based NetworkFilipe Faria Da Silva; Claus Leth Bak; Per Balle HolstI E E E Transactions on Power Delivery, Vol . 27, No . 4, pp . 1902-1908 .

Thermal Battery with CO2 Compression Heat Pump: Techno-Economic Optimisation of a High-Efficiency Smart Grid Option for BuildingsMorten Blarke; Kazuaki Yazawa; Ali Shakouri; Carolina Carmo Energy and Buildings, Vol . 50, p . 128-138 .

A Review of Power Electronics Based MicrogridsXiongfei Wang; Josep M . Guerrero; Frede Blaabjerg; Zhe Chen International Journal of Power Electronics, Vol . 12, No . 1, pp . 181-192 .

Low Stoichiometry Operation of a Proton Exchange Membrane Fuel Cell Employing the Interdigitated Flow Field - A Modelling StudyTorsten Berning; Søren Knudsen KærInternational Journal of Hydrogen Energy, Vol . 37, No . 10, pp . 8477-8489 .



Enhanced Decoupled Double Synchronous Reference Frame Current Controller for Unbal-anced Grid-Voltage ConditionsManuel Reyes; Pedro Rodriguez; Sergio Vazquez; Alvaro Luna; Remus Teodorescu; Juan Manuel Carrasco I E E E Transactions on Power Electronics, Vol . 27, No . 9, pp . 3934-3943 .

Numerical Simulation of Effect of Catalyst Wire-Mesh Pressure Drop Characteristics on Flow Distribution in Catalytic Parallel Plate Steam ReformerHaftor Örn Sigurdsson; Søren Knudsen Kær International Journal of Hydrogen Energy, Vol . 37, No . 12, pp . 9485-9495 .

A New Technique for Tracking the Global Maximum Power Point of PV Arrays Operating Under Partial-Shading ConditionsEftichis Koutroulis; Frede BlaabjergI E E E Journal of Photovoltaics, Vol . 2, No . 2, pp . 184-190 .

Control Configuration Selection for Multivariable Nonlinear SystemsHamidreza Shaker; Mohammad KomarejiIndustrial & Engineering Chemistry Research, Vol . 51, No . 25, pp . 8583-8587 .

Euler–Lagrange Simulation of Gas–Solid Pipe Flow with Smooth and Rough Wall Boundary ConditionsMatthias Mandø; Chungen Yin Powder Technology Vol 225, pp . 32-42 .

Towards a better Understanding of Biomass Suspension Co-Firing Impacts via Investigating a Coal Flame and a Biomass Flame in a Swirl-Stabilized Burner Flow Reactor under same ConditionsChungen Yin; Lasse Rosendahl; Søren Knudsen Kær Fuel Processing Technology, Vol . 98, No . 1, pp . 65-73 .

Control of Power Converters in AC MicrogridsJoan Rocabert; Alvaro Luna; Frede Blaabjerg; Pedro RodriguezI E E E Transactions on Power Electronics, Vol . 27, No . 11, pp . 4734-4749 .

Comparison of Reynolds Averaged Navier Stokes Based Simulation and Large Eddy Simulation for one Isothermal Swirling FlowYang Yang; Søren Knudsen Kær Journal of Thermal Science, Vol . 21, No . 2, pp . 154-161 .



The SPOT 2012 Student Conference “The SPOT” is a student conference focusing on engineering subjects and is hosted by the department . The conference is organised by students for students and the goal of the conference is to give young students a chance to write scientific papers for presentation in a student forum . By participating in the conference students become familiar with writing an abstract for a scientific paper as well as the general rules for writing a conference paper .

Annual Energy Seminar 2012Every year, the Energy Sponsor Programme at the department arranges an annual Energy Seminar . The seminar was as usual held in December and once again focus was on current subjects and problems within the area of energy . In the morning the programme consisted of presentations by external speakers focusing on e .g . renewable energy and Danish chal-lenges in a global context and the afternoon was focusing on presentations of interesting projects within the eleven research programmes at the department . Employees and guests at the Department, members of the Energy Sponsor Programme, collaboration partners in the industry as well as other departments at Aalborg University participated in the seminar .

5th Annual Vestas Power Programme SymposiumIn December, The Vestas Power Programme and the department invited to the 5th Annual Symposium on Grid Integration of Wind Energy . During the day presentations were made by both university researchers and people from the industry from all over Europe . In 2012 the symposium was held at the Utzon Centre in Aalborg .

31st International & 10th European Conference on Thermoelectrics, ICT/ECT2012The ICT conference is the leading annual meeting in the field of thermoelectrics . The confer-ence focuses on materials as well as design and fabrication of modules and device perfor-mance . In 2012, the department was hosting the conference, which was held in Nordkraft, Aalborg . Honouring the long tradition of high standards of the previous ICTs, the ambition of the ICT/ECT2012 was to bring the field of thermoelectrics to the awareness of the general public as a contributing technology for efficient and sustainable energy conversion and use in the future . More than 600 researchers, students and exhibitors participated in the conference .

PEDG 2012In 2012, the third symposium of Power Electronics and Distributed Generation (PEDG2012) was organised by the department . It was held in Aalborg, following up on two success-ful symposia in China in 2010 and 2008 . The newest knowledge within the field of power electronics was presented orally by researchers from all over the world . The symposium was sponsored by IEEE Power Electronics Society .

Selected Events


Graduation 2012 ICT conference

GraduationIn June, the department held the yearly Graduation Ceremony for Masters graduating from Electrical Power Systems and High Voltage Engineering, Mechatronic Control Engineering, Power Electronics and Drives, Thermal Energy and Process Engineering and Wind Power Systems . Jørgen Mads Clausen, the Chairman of Danfoss A/S held a speech for the gradu-ates before they received their diplomas . Moreover, the Energy Sponsor Programme at the department handed out 1st, 2nd and 3rd prizes to the project groups demonstrating marvellous academic skill, extraordinary engagement and solid work throughout their work with the master thesis . After the ceremony a reception was held at the department .

Student Poster PartyThe Student Poster Party is an annual event held for staff, students and especially all international students at the department . The Poster Party is a chance for the students to meet each other across specialisations and semesters . Each nationality presents the best (or worst) sides of their country through a short presentation supported by a poster . Prizes were given to the best posters and presentations .

Selected Events

Student Poster Party


Renovation and updating of the department laboratoriesIn 2012, a large renovation and update of the department laboratories was initiated . The reno-vation is done in stages and extends to 2015 . After the renovation, we will have a large range of new world class facilities at our disposal, which not only include student facilities, but also central research facilities within the electrical and thermal area:

• New bio oil facilities with advanced test and demo equipment• Updated laboratory for fuel cells and batteries• Heavy laboratory for large experimental set-ups with power of up to 1 MW• Advanced reliability laboratory for test of lifetime etc .• New drive systems laboratories with possibility of testing electrical cars• Medium voltages laboratory with 20 KV and 1 MW testing of converters etc .• Advanced photovoltaic laboratory with new opportunities for characterising and testing of photovoltaic components and systems • New facilities for testing integrated energy systems, e .g . green buildings• Characterisation and test of power electronic converters for wind turbines etc .• New fluid power laboratory with testing of wave energy PTO systems among others• Flow laboratory with wind tunnel• Smart Grid and MicroGrid laboratories with advanced test opportunities• High voltage laboratory with updated test systems• Offshore laboratory with wave basin among others• Outdoor platforms for testing solar heating, photovoltaic cells, small wind turbines, heat pumps etc .

The renovation includes our laboratories in both Aalborg and Esbjerg . In the same period we will, besides the new laboratories, also establish new buildings for students as well as the em-ployees in Aalborg .

SWIR Camera with PV ModuleWind Tunnel

Selected New Laboratory Facilities



Battery and Fuel Cell LaboratoryA 50kW ERS-800-500 Heinzinger high voltage power supply has been added to the battery and fuel cell laboratory . The power supply is capable of both sourcing and sinking power, enabling charging and discharging of large battery packs with voltages up to 800V and currents of +/- 500A, supplying inverters with varying DC-link voltages and emulating the dynamic current load of modern hybrid elec-trical energy systems .

Power Electronic Converter Lifetime Test SystemsTesting of power electronics components include double pulse, ware out using power cycling with sinusoidal or pulse excitation with program-mable Tmean and Tdelta . Ac-curate measurement of conduction voltage in static and dynamic test of devices . Advanced thermal camera and fiber optical measure-ment for characterisation of open module temperature profile . Also Tj identification methods using conducting voltage are being investigated . Current levels are up to 3000A and voltage up to 2000V .

Photovoltaic Systems Laboratory In 2012 an A+A+A+ solar simulator, SPI-Sun 5600SLP and a high sensitivity InGaAs short wave infrared (SWIR) camera for electrolu-minescence (EL) testing of PV modules have been acquired . Both devices will primarily be used for research on PV module diagnostics and degradation, but the research group will also offer services to local Danish PV manu-facturers and installers for high accuracy measurement of their modules .

Photo of the Spire SPI-SUN 5600 SLP solar.



Fluid Power Laboratory / Wave Simulator TestbenchThe laboratory includes the world’s first full scale wave simulator testbench, designed for testing Power Take Off (PTO)-systems for wave energy converters . The testbench is able to produce forces of more than 800 kN at velocities up to 1 m/s, and is fully equipped with state of the art transducers . The test-bench will be used to analyse, optimise and compare different PTO-systems and for developing new control strategies for wave energy systems .

Intelligent MicroGrid LaboratoryThe iMGL will allow to test and implement control and energy management strategies for MicroGrids, being suitable for next PhD/Industrial courses programmed in AAU .

The laboratory is based on 28 dc-ac power electronics converters controlled by dSPACE system . The flexibility of this platform allows multiple configurations like grid-connected and islanded MicroGrids, DC-AC and hybrid MicroGrids, or multiple MicroGrids clusters .

DC MicroGrid LaboratoryThe Laboratory consists of several setups where each one of them has dSPACE systems, 24 DC/DC converters, constant power elec-tronic loads and multiterminal medium volt-age connection 1000V/65A . In every setup 24 converters are going to be controlled through a real-time platform dSPACE control desk . It is possible to develop parallel connection of converters to form a common low voltage and medium voltage DC bus (until 1000V/65A) among others .



100 kW Drives Test SystemIn order to characterise and test electrical drives primary for the automotive sector a 100 kW test bench, originally sponsored by Sauer Danfoss, has been upgraded and set into op-eration . Currently the test bench is equipped with a load machine in form of Siemens servo motor which is able to deliver a peak torque of 500 Nm and operate up to 3600 rpm . With the 1000 Nm torque transducer and a power analyser the test bench is used for making efficiency maps of in-house developed near wheel drives for electrical vehicles .

Electric Vehicle ProjectAs a part of the project “The Future High-Efficiency Electric Car, Integrated into the Electricity Supply Network” the department has converted an Audi A8 into an electric car . The power train of the converted vehicle con-sist of two electric machines with integrated magnetic gears, which gives an extremely high power/torque density, two inverters for the speed/torque control of the car, and an 800 V battery pack . In Figure 1 the converted Audi can be seen and in Figure 2 it is seen that the high voltage battery packs have been installed in the engine compartment where the internal combustion engine used to be . The two electric motors are connected to the rear wheels of the car .

The Audi A8 converted into an electric vehicle.

The battery pack of the converted Audi.


Best Paper Award for research in wave energyAt the ASME Symposium on Fluid Power and Motion Control FPMC 2012, Associate Professor Henrik C . Pedersen and co-authors Anders H . Hansen, Rico H . Hansen, Torben O . Andersen and Michael M . Bech all from the Department of Energy Technology received a prize for their paper ‘Design and Control of Full Scale Wave Energy Simulator System’ .

PhD Student awarded with two prizesIn 2012, Kristian Kjær Justesen received two recognised prizes . At the Fuel Cells 2012 Science & Technology Conference he was awarded the Best Poster Paper Award for the poster ‘Methanol Reformer System Modeling and Control using an Adaptive Neuro-Fuzzy Inference System approach’ . At the 3rd Carisma International Conference he was winner of the 2nd Poster Prize for the poster ‘Control of a methanol reformer system using an Adaptive Neuro‐Fuzzy Inference System approach’ . Both posters were made together with John Andersen, Mikkel P . Ehmsen, Søren J . Andreasen, Hamid R . Shaker and Simon L . Sahlin .

Best Paper Award for research in Fuel Cell Systems Assistant Professor Benoit Bidoggia is author of the paper ‘Estimation of Membrane Hydration Status for Standby Proton Exchange Membrane Fuel Cell Systems by Impedance Measurement: First Results on Stack Characterization’ which received the Best Paper Award at the 7th International Conference & Exhibition on Ecological Vehicles and Renewable Energies (EVER) . The paper is co-authored by Professor Søren Knudsen Kær .

International honour for patented inventions and frequent collaborationProfessor Remus Teodorescu has received the international engineering association IEEE’s highest acknowl-edgement for his contribution to improvement of renewable energy production . Patented inventions and frequent collaboration with the industry are among the arguments for the prestigious nomination of IEEE fellow .

International Honour for results in renewable energy systems connected to the grid Professor Marco Liserre has received the international engineering association IEEE’s highest recognition for his contribution to the improvement of renewable energy production . More than 100 frequently cited scientific articles and numerous excellent research results in renewable energy systems connected to the grid are among the reasons for the prestigious title of IEEE Fellow .

Award to PhD student and Professor for CORPE articleIEEE ECCE in the U .S . is the most prestigious conference in electrical energy conversion, including power electronics and wind turbines, and in competition with 500 other articles submitted, PhD Student Ke Ma and Professor Frede Blaabjerg were awarded a prize and a top three placement . This impressive achieve-ment was for an article on intelligent control of a wind turbine when the net is a little unstable – a critical factor in being able to handle large amounts of wind energy in an electrical network .

Awards and Honours

Kristian Kjær Justesen Benoit Bidoggia Ke Ma


Key Figures

Publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 319

Student intake (first study year)Aalborg bachelor . . . . . . . . . . . . . . . . . . . . . . . . . . . 58Aalborg bachelor of science . . . . . . . . . . . . . . . . . 9Esbjerg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Student intake Aalborg (Master) . . . . . . . . . . . 59

Total number of students as of October 1Aalborg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247Esbjerg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299

Graduated students in AalborgBachelor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30Master . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

PhD studentsGraduated PhD students . . . . . . . . . . . . . . . . . . . . 22New PhD students . . . . . . . . . . . . . . . . . . . . . . . . . 35Total PhD students . . . . . . . . . . . . . . . . . . . . . . . . . 82

Total number of employeesat the Department . . . . . . . . . . . . . . . . . . . . . . . . . 185

TurnoverTotal turnover (m) . . . . . . . . . . . . . . . . . . . . . . . . . . 108External turnover (m) . . . . . . . . . . . . . . . . . . . . . . . 56


The Department of Energy Technology receives guest on a continuous basis . This ensures good in-ternational contacts and knowledge sharing across borders . Both scientific staff and students benefit from the international environment created by the many guests as well as the knowledge these people bring to our department . Below you will find a list of guests at the department in 2012 . For further information please visit our homepage.

Haijiao Wang (PhD Student), Zhejiang University, Hangzhou, ChinaWenjie Chen (PhD Student), Zhejiang University, Hangzhou, ChinaFen Tang (Post Doc), Beijing Jiaotong University, ChinaChristian Blanco (PhD Student), University of Oviedo, Gijón, SpainYanBo Wang (PhD Student), Southwest Jiaotong University, ChinaJiahu Guo (PhD Student), Shanghai University, ChinaHui Zeng (PhD Student), China University of Mining and Technology, Xuzhou, ChinaZhe Zhu (PhD Student), Tianjin University, ChinaRafael Peña Alzola (Post Doc), UPV-EHU, Spain Allan Montanari (PhD Student), University of Manitoba, CanadaElvira Baygildina (PhD Student), Lappeenranta University of Technology (LUT), FinlandNatalia Angela Orlando (Post Doc), Politecnico di Bari, Italy Tomislav Dragicevic (PhD Student), University of Zagreb, Croatia Jun Yao (Associate Professor), Chongqing University, ChinaWeimin Wu (Associate Professor), Shanghai Maritime University, ChinaZhihui Chen (Associate Professor), Nanjing University of Aeronautics and Astronautics, ChinaAlexander Micallef (PhD Student), Warsaw University of Technology, PolandGang Shi (PhD Student), Shanghai Jiao Tong University, ChinaMicea Baba (PhD Student), University Politehnica of Timișoara, RomaniaOvidiu Roman Pelan (PhD Student), University Politehnica of Timișoara, RomaniaYong Fang (Associate Professor), Beijing University of Chemical Technology, China

Guests at the Department


Hongfei Wu (PhD Student), Nanjing University of Aeronautics and Astronautics, ChinaRonny Barufke (PhD Student), Glyndwr University, United KingdomMatthias Vonmetz (Master Student), Bergische Universität Wuppertal, Germany Mehmet Dal (Associate Professor), Kocaeli University, TurkeyJoaquin Elroy-Garcia (PhD Student), Carlos III University of Madrid, SpainXiaonan Lu (PhD Student), Tsinghua University, Beijing, ChinaTzung-Lin Lee (Assistant Professor), National Sun Yat-sen University, Kaohsiung, TaiwanDomenico Ricchiuto (PhD Student), Politecnico di Bari, ItalyAdam Milczarek (PhD Student), Warsaw University of Technology, PolandSteluta Nedelcu (PhD Student), University Politehnica of Bucharest, RomaniaJinwei He (PhD Student), University of Alberta, CanadaMing Cheng (Professor), Southeast University, Nanjing, ChinaLucia Alvarez Gonzalez (PhD Student), Instituto Nacional del Carbón (INCAR-CSIC), Oviedo, SpainQuan Xu (PhD Student), Southwest Jiaotong University, ChinaWenzhou Liu (Professor), Changchun Institute of Technology, ChinaIoan Curac (PhD Student), Technical University of Cluj Napoca, RomaniaLei Xiao (PhD Student), Hunan University, ChinaIoan Trifu (PhD Student), University Politehnica of Bucharest, RomaniaVasile Simion Craciun (PhD Student), Technical University of Cluj-Napoca, RomaniaGeev Mokryani (PhD Student), University of Salerno, Salerno, ItalyYuqiu Zhang (PhD Student), Zhejiang University, Hangzhou, ChinaEnda Cagal (PhD Student), Istanbul Technical University, TurkeyWei Mo (PhD Student), Nanyang Technological University, SingaporeXiong Liu (PhD Student), Nanyang Technological University, SingaporeChi Jin (PhD Student), Nanyang Technological University, SingaporeChangjin Liu (PhD Student), Zhejiang University, China




Cases from guests in 2012

Zhe Zhu

“I am Zhe Zhu . I come from Tianjin University which is located in China . I am a phD guest and my supervisor is Lasse Rosendahl .

Our research group is working with sustainable generation of bio fuels from low value biomass by the thermochemical method such as hydrothermal liquefaction . The main objective of this work is the high efficiency conversion of lignocellulosic biomass to generate bio-oil in sub/super-critical water at a temperature of 280-380°C, where non-catalytic and catalytic liquefaction were operated in both batch autoclave and a continuous operation unit . The effects of the treat-ment conditions such as temperature are discussed and in addition, a reaction pathway and modelling of the reaction kinetics are investi-gated . “

Hui Zeng

“I am from China University of Mining and Technology, Xuzhou City, Jiangsu Province, China . I am a PhD guest and I work with Professor Zhen Chen and Xiao Liu in the department .

I am researching the toque ripple reduction of SRM (Switched Reluc-tance Motor) . An optimal TSF (Torque Sharing Function) of smooth torque with minimum supply voltage for SRM is studied . This research tries to solve these problems . First, what is the optimum TSF for pro-ducing the maximum smooth torque? Second, what is the relation-ship among maximum smooth torque, maximum current, rotation speed and supply voltage?”


Graduated in 2012

Students’ names Specialisation

Markos Katsanevakis EPSH4

Daniel Leo Ólason EPSH4

Thomas Ebdrup EPSH4

Morten Thule Hansen EPSH4

Kasper Schultz Pedersen EPSH4

Alberto Palomar Lozano EPSH4

Kenneth Rønsig Kanstrup EPSH4

Cam Pham PED4

Daniela Boian PED4

Valeriu-Ciprian Biris PED4

Elena Anamaria Man PED4

Nicolae-Cristian Sintamarean PED4

Tomasz Rybarski PED4

Adrian Hasmasan PED4

Vlad Muresan PED4

Rafal Krakowski WPS4

Antoni Mir Cantarellas WPS4

Bogdan Sfurtoc WPS4

Fabio Mario Rossi WPS4

Andrea Isidori WPS4

Andres Suarez Gonzalez WPS4

Angel Ruiz de Vega WPS4

Emmanouil Dimopoulos WPS4

Michele Martino WPS4

Ioannis Kyriakidis WPS4

Students’ names Specialisation

Mads Hellegaard Andersen TEPE4

Rune Wiben TEPE4

Luis Fernando García TEPE4

Emil Zacho Rath TEPE4

Morten Ryge Bøgild TEPE4

Jonas Lundsted Poulsen TEPE4

Martin Larsen TEPE4

Troels Bartholin Bertelsen TEPE4

Jakob Holmer Sehested TEPE4

Kristine Husballe Munk TEPE4

Carolina Carmo TEPE4

René Haller Schultz TEPE4

Thomas Helmer Pedersen TEPE4

Kåre Elgaard Buskov TEPE4

Rasmus Møller Bering TEPE4

Morten Aalbæk Kristensen TEPE4

Mikael Højen MCE4

Morten Hyldgaard Sørensen MCE4

Michael Holme Sørensen MCE4

Kristian Kjær Justesen MCE4

Mikkel Præstholm Ehmsen MCE4

John Andersen MCE4

Cemre Yigen MCE4

Thomas Schmidt MCE4

In total: 49

Contact Information

Aalborg UniversityDepartment of Energy TechnologyPontoppidanstræde 101 · 9220 Aalborg East · DenmarkPhone: +45 9940 9240 · Fax: +45 9815 1411 · www .et .aau .dk

Head of DepartmentJohn K . Pedersen · +45 9940 9264 · jkp@et .aau .dk

Department SecretaryTina L . Larsen · +45 9940 9240 · inst-sekr@et .aau .dk

Aalborg University EsbjergNiels Bohrsvej 8 · 6700 Esbjerg · Denmark

Section Leaders AalborgElectric Power SystemsBirgitte Bak-Jensen · +45 9940 9274 · bbj@et .aau .dk

Thermal Energy SystemsMads Pagh Nielsen · +45 9940 9259 · mpn@et .aau .dk

Power Electronic SystemsStig Munk-Nielsen · +45 9940 9242 · smn@et .aau .dk

Fluid Mechanics and CombustionHenrik Sørensen · +45 9940 9261 · hs@et .aau .dk

Electrical MachinesEwen Ritchie · +45 9940 9241 · aer@et .aau .dk

Fluid Power and Mechatronic SystemsTorben O . Andersen · +45 9940 9261 · toa@et .aau .dk

Section Leader EsbjergJens Bo Holm-Nielsen · +45 9940 3317 · jhn@et .aau .dk

65258_aarsrapport-2012

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